Self-erasing memorandum pad



Jan. 15 1924.

' A. W. WEEDEN SELF ERASING MEMORANDUM PAD Filed Feb. 10 1925 IT? Vendor: by m @@&a

rowed 1 15,1924.

um reo STA"l'E-Sf' PATENT oer-ice.

name. w. wsanmr, oroumcr, MASSACHUSETTS, assronon' or ens-mmwe arms moor, orvnmcmronr, REVERE, mssncaosms. v

W sm-amsme moaimnpir 21m,

Application and February 10, 1928. 1 aerm' leeiaavo.

To all whom it may concern.

Be it known thatLAnrnUR Wimnrm, a citizen of the United States, residin at Quincy, in the county of Norfolk and tate of Massachusetts, have invented certain new and useful Im rove'ments in Self-Erasing -Memorandum ads, of which the following is a specification. Y

My invention relates to the so-called selferasmg pads for recording meinoranda or notes, in which the movements of a writing point upona smooth 'non-recording writin surface are registered on a thin and pre erably translucent ording sheet lying below said writing sur ace, b the forcing of said sheet into contact an mildadhesion with a pigmented surface located just below the same, and thereby causing the pigment to show'through the recordin sheet alon the lines of such adhesion and t us to recor the movements of the writing point.

In pads of the foregoin character the erasure of the recorded mar in by causing the separation of t e recording sheet from the pigmented surface, the sheet and pigmented surface being of such nature that none of the pigment is transferred. to

the sheet as a result of the adhesion; andsuch separation has been e'fi'ected in the case of all self-erasing pads which have come to attention, by seizing one edge or corner 11] 'of the non-recording sheet and ulling it are com ined in a compact and convenient form, and in which, more espec ally, there is provided novel means for efiectmg the separation of recording sheet and pigmented surface for the purposes of erasure, without the objectionable teoring or wrinkling of therecording sheet above; mentioned.

M invention is show? in-the accompanyin% rawings, in which e igure 1 is a view owing my padin plan, looking from abo layersy lland 2, is a movable member confined in. the proper :position;

tions or elements making;- up my 'pa "Figure 2 shows'the pigmented. latetlo getherwith'the frame by'whichthel same i, i

arranged in the relative positions in which the same are later secured together in asj semhled relation; these bein shown as of exaggerated thickness for c earness.

I Figurefi is a viewshowing in plan a modi- 'ed orm of 'my inv'ention; and

the said modified form.

" Referring to said Fi which illustrate one of t of myi'nventiomthe ad comprises top and bottom layers, respectively 1 and'2, formed from car board or other similar or suitable material, cut into the desiredsha rectan 'ular as shown, and of substantia yidenltica size. Slots or apertures, 3, shaped dimensioned and located as is hereafter. described, are cut in each of the top and bottom layers 1 and 2, inregistration with one another. The top la er.1 is also cutawayform, as shownin ifi. 1,a circular ofpenmg 4 located towards t 0 lower part o the area; of thesame. I v l Lying between the top. and the boltltom ereinafter called a plate, 5, having limited capacity for movement within a frame 6 '1 surrounding the same, and prefer slightly thicker than the sheet material from,

which the plate is formed for masons which will be hereafter noted. he outer edges of the frame are such that-said frame conforms in its size and shape, with the to and bottom la ers, 1 and 2, between whic it is interpose v The plate 5 has a base portion which is of substantiallycircular outline alongits bottom edge, while above said base portion the plate tapers ofi 'to form a we shaped tongue.;5,'of which the top en extends well up towards the top of the pad. a

Theinterior'oftheframe 6 is cut away to rovid'e' an opening of which the peri ,hery. closed-b the marginalportions 0 said frame; an within such opening the late Fi" re 5 shows thepigmented plate and v ame-used in-connection therewith in res 1,2, and. 3, preferred formsion 5 is located. "-vThe'lower portion, 7, o the periphery- 0f said' '0 nm is' of a circular outline substantially t at offthe-circular I top on i adapted to lie within the plate 5, which a capacity for opening of the frame 6 with ,a slight angular rotation or movement with.

respect thereto. To permit the amount of such movement or rotation desired, of the plate 5, the side and the top peripheries of said opening in the frame 6, respectively indicated at 7 'and 7, are sufiiciently cut away above said circularly outlined bottom peripheral portion 7, so as to allow the" play or swinging movement of the of the tongue 5 of the plateeand \for this purpose the top periphery '1 ofsaid openmg an t are of corresponding arc-like outlines.

'" The centers of the circular arcs outlining necesar the base portion of the plate 5 and the peripheral portion 7 of the 'frameedge p'ro-" movement of a finger inserted through said,

hole 8 in the ton gue of theplate, from one end of the slots 3 to the other end, will effect an angular swing of said tongue within the limits permitted by the frame opening, thereby produce a corresponding slight angular shift in position or rotation of the circularly outlined base portion of the plate 5 lsying-opposite the aperture 3.

d circularly outlined base ortion of the plate 5 and the portion of t e tongue wlying immediately above the same, are

enoughlargerin area than the. aperture 4, opposite and substantially concentric t erewith, so that thc superficial area of said .the required plate which is in registration with said opening presents a continuous and uninterrupted surface. ,Such registering surface ofthe plate, as is indicated injF-ig. 2, is coated with a pigmented preparation, which is of a mildly adhesive nature to any thin paper or fabric pressed thereagainst, but which ,is easily released therefrom by any slight relative movement or'shifhbetween the surfaces of the paper and the pigmented portion of (the plate. Pigmented preparations having characteristics are well .known andI make no claim as to. novelty in the art i with regard thereto. In practice I provide a surface having the desired characteristics by "mingling pigment of appropriate color, preferably 1 ply the same in melted form over the part of ,the surface to be pigmented;

Over the opening 4 extends, preferably secured to the inner surface of the top layer he top edge 5" of the tongueand also, I provide both sides of the ack, with a waxy base and. ap

1, of the pad, a writing surface of thin and flexible material, as for example thin sheet 9 of celluloid, which is transparent and is not adapted to record the markings of a pencil or other writing point used thereon. Lying immediately below and in contact with, though free from, said non-recording writing surface 9, is a so-called recording sheet 10 of thin and preferably translucent material, such as thin tissue or very light fabric. Suitable material of this nature is already well known in the art, and I make no claims. thereto as novel.

Said.recordingsheet 10 is of an -area adapted to cover the aperture 4 with a sulficient marginal overlap to permit of the securing of the same by means of said overlap, either upon the writing surface 9 at the marginal portions. thereof, or u on the frame 6, if preferred; my object ein to provide a recording sheet which is slig tly stretched and lying between the writing surface and the recording sheet but unattached with respect-to either where the same lie opposite the aperture 4, and which sheet is fixed or secured in any suitable manner so that any slipping or rotational movement thereof in [unison with the plate 5, as the angular. swinging of the-same takes place. is prevented.

The completion of my pad is preferably accomplished by assembling the parts entering into the construction of the same as herelnabove described; in the order in which the same are shown in Fig. 3; and, suitable adhesive havin been applied along the marginal portions 0 the upper layer 1, the writing surface 9,. the recording sheet 10, the frame 6-(haVing the plate 5 positioned With capacity for free movement within the opening thereof), and the bottom layer 2, said parts are put under pressure until the adhesive has hardened. Y

It may be found desirable to construct the frame 6 of sheet of material slightly thicker than the plate 5, in order to insure the free swinging of the plate without binding between the bottom layer 2 and the recording sheet and writing surface lying superimposed above the plate. Preferably, the words To erase on finger hole 8, together with a directional arrow, asshown.

The special novelty of. my improved pad resides in the fact that the construction of the same as 'hereinabove described permits the erasure of the markings thereon in a simple manner without handling of the recording sheet in any way. As above explained, the markings are rendered visible y reason of the "adhesion of the recording sheet with the ig'meiited surface. To erase the markings, 3m finger is inserted through the hole 8 in the end of the tongue of t e plate carrying the pigmented surface, and

the lateral movement of the finger towards one end of the-slots 3 causes an an ar swing of the tongue, with a corresponding slightrotat'ion of pi mented surfa of the plate 5, relative to t e stationary and fixed recording sheet with which it'isin adhesion, which is sufiicient to break up the adhesion and thereby cause the erasure and disappearance of the markings] This erasing process may be repeated practically without limit without injuring the recording sheet in any way other than the wearand tear necessarily to be expected, so that I secure for my pad a long life and also a simple and effective arrangement for effecting the erasure.

Figures 4 and 5 show a modification of my invention in which the late is rectangular in form and is s 'ghtly smaller than the similarly shaped opening in theframe 16 within which 'it lies. A finger hole 18 registering with a somewhat larger lobed o ning 13 in the layers forming the top an bottom of the pad enables the plate to be given a slight sidewise or an up and down shift in its position relative to the fixed recording sheet when erasure is desired. The surface of the late 15 is pigmented below the dash-and-dot line indicated on Fig. 5.

. While I strongly recommend the use of. the writing surface 9 as a part of the pad,

this, surface is not an. indispensable element; since if a smooth and rounded blunt non-writing point is employed,.the' writing movements may be made directl upon the recording sheet itself, which wil thereupon claim an act in the manner above described to record the marksand laterto effect the erasure of the same. I advise, however, the use of the non-recording writing surface 9 as being more satisfactory in the great'majority of Bevindescribed. my invention, what I g desire to secure by Letters Patent 1: A self-erasing memorandum pad, or

I the like, comprising recording and pigmented surfaces located in approximate parallelism and in close proximity with one another, and-means for causing-.21 relative movement between said surfaces in substantially dparallel planes, substantially. as describe I 2. A self-erasing'memorand'um ad, or the like, comprisingarecording 'sur cc and a pifinented surface lying in approximate para, elism with. and adjacent to one ana pigmented surface, a fixed recording, sheet extendin over and lying adjacent .said' pigments surface, and means for effecting a shift of the pigmented surface relative to the recording sheet, substantially as described. n

4. A self-erasing pad, or the like, comprisin a frame lncluding an" opening orme therein and a plate located within said opening arranged to swing with respect to the frame, a pigmented surface carried upon the said plate, a fixed record: ing sheet extending over, and lying adjacent said pigmented surface, and means for effecting a rotative movement of the pi 8 mented surface relative to the said recor ing sheet and in substantial parallelism therewith, substantially as described.

5. A self-erasing memorandum pad, or the like, comprising an upper layer vided with an aperture, a non-recor ing writing surface extendin over said aperture, a plate located wit in said pad and having a capacit for a rotational shift of its surfacerelative to the pad, said plate having a pigmented surface located in registration with said aperture, a recording sheet in attachment with the pad and lying intermediate the writing surface and-the pigmented surface, and meansby which a rotative-movement of the pigmented sur face relative to the recording sheet can be effected, as desired. i 6. A pad including a frame enclosing a plate having capacity for a swinging movecommunicated to the tongue and the plate sufiicient to effect a rotational-movement; of the surface of the plate carrying pigment relative to the recordin sheet.

y g ARTHUR WEEDEN. 

